Device for imparting a tumbler motion to vertical structural parts

ABSTRACT

613,547. Door-operating appliances. DE VRIES ROBBE &amp; CO., N.V. May 6, 1946, No. 13619. Convention date, June 5, 1944. [Class 65 (i)] [Also in Group X] A device adapted to move an overhead door 3, pivoted substantially at its centre on a radially movable support 4, by exerting on the upper anc lower parts of the door a substantially horizonta and vertical force respec tively, is characterised in that a cable or chain 8 i attached by its respective ends to the top and bottom of the door, the cable passing over rollers or the like, at least one of which is displaceable horizontally away from the door. As shown, displacement of the roller 6 in the direction of the. arrow serves to open the door. In a modification, the directions of the forces exerted by the ends of the cable are reversed, i.e. displacement of the roller 6 in the direction of the arrow serves to close the door. It is stated that both the above systems can be applied to the same door. Alternatively, either one or the other may be used, the door being respectively closed or opened by means of counterweights, spring means, or the like.

J. WIELAND DEVICE FOR IMPARTING A TUMBLER MOTION TO VERTICAL STRUCTURAL PARTS Filed Dec. 24, 1947 Patented Sept. 2, 1952 DEVICE FOBIIMBARTINGA TUMBLElt-Mde TION TQ STRUCTURAL PARTS Jacob Wieland, Gorinchem, Netherlands; assignor to De Vries Robbe- & N; VI, Arkel'schedijk,

Gorinchem, Netherlands Application'December 24, 1947, Serial No. 793,644

In the Netherlands June 5, 1944 secuuu 1, Public Law 690, August 8, 1946 Patent expires June5, 1964 I This invention relates to operating arrangements for coveringor uncovering an opening in a vertical wall by means of arigid closure member such as a door of the slide-up turn-over type. More particularly, the invention relates to doors,

5 Claims. (Cl. 268-914) an intermediate portion of which is hinged by one or more arms to the wall and which are slidably guided with their lower end alon thesaid wall so that the doors will swing about said arm or arms when moved from one position into the other.

Small doors or hatches can, of course, be manually opened and closed without much'difliculty, but for larger units special operating devices are usually required. There are already. known op erating devices comprising an endless chain or cable secured to thetop edge of the door for exerting a substantially horizontal pull upon the door so as to move the same into an open position. There are further known operating systems in which. a vertical force is applied to the bottom of the door' for pulling the. same into an open or closed position as the case may be; There are also known various counterweight arrangements for balancing the door. However, all these known arrangements require the application of a com paratively large force and tend to cause jerky door movements since the coupling forces applied to the door do not act in the most favorable direction as will be more fully explained hereinafter. I

Fig. '3 .isa diagrammatic view of an: operating arrangement according to the invention for closing a door, and I Fig. 4 is a diagrammatic view of an operating arrangement according to the invention for opening'the door. 2

Referring first to Figs. 1 and 2 in detail, these figures each show a vertical wall I having an opening 2 therein. This opening can be covered or uncovered by a rigid door 3.1 The door is supported by one Or more arms 4 which are hinged One of the principal objects of the present invention is to provide an operating arrangement by which a comparatively heavy door can be smoothly opened and closed.

Another object of the invention is to provide an operating arrangement which permits a smooth opening or closing of the door by the application of comparatively small force since the applied forces. act upon the door in the most favorable direction.

Other and further objects, features and advantages-of the invention will be pointed out hereinafter and set forth in the appended claims forming part of the application- In the accompanying drawing several no w prefe'rred embodiments of the invention are shown by way of illustration and not by way of limitation. i

In the drawing: i 5 Fig. 1 is a diagrammatic view of a door in substantially closed position showing the direction ofthe forces applied to the door.

Fig. 2 is a diagrammatic view of the door in substantially opened position also showing the direction of the forces applied to the door.

at It to an intermediate point of the door and at H to wall I. As will'be noted,' arms 4 are hinged to the wall at a point above the upper edge of the wall opening 2 and to the door near the center ofgravity thereof. The lower end of each door supports one or more rolls 5 by means of which the doors are guided in the frame of the door opening 2 andalongsdie of wall"! so that the doors can move in a manner which will be obvious from an examination of Figs. 1 and 2.

The present invention is concerned with the opening and closing of doors suspended as explained in eonnection with Figs. '1 and 2.

Letit now be assumed that it is desired to open the door of Fig. '1 and that for this purpose an upwardly directed vertical force is applied to the loweredge of the door. Such force will result in an opening of the door but it has to be a very large force since the-useful'component of force is bound to be small clue to the nearly vertical position of the'door. Furthermore, the door movement is likely to be jerky in view of the large forces involved. If now, a substantially horizontal force is applied to the upper edge of the door as indicated by the arrow P, it will be found that the door can be easily and smoothly opened sincenow the component or'force acts in a more favorable direction. Turning now to Fig. 2, it will be apparent that a horizontal force applied'to' the upper edge of the door will close the same but must be large and will cause the jerky door movements. 'If, however; a vertical downwardly directed'force is applied to the lower edge of the'door as indicated by arrow P, the door can be easily and smoothly closed.

The foregoing analysis of the effective forces show that by judicious application of horizontal and vertical forces, a heavy door can be smoothly and easily opened and closed.

Figs. 3and 4 show operating arrangements by which the most'favorable vertically and horizontally acting forces can be applied to a door suspended as previously explained.

Referring first to Fig. 3, which shows a door closing arrangement. a cable or chain 1 is secured at 9 to the upper edge of the door 3 and guided over stationary pulleys I2 and I3 to a movable pulley I4. Similarly, the lower edge of the door is secured to a cable 8 which is guided over fixed pulleys I5 and I6 to the loose pulley I4. Cables or chains 1 and 8 are shown as being joined so that they may be considered as an endless chain.

If it is now desired to close the door a pull is applied to pulley I4 in a direction away from wall I as indicated by arrow 6. Consequently, cable section 1' exerts a substantially horizontal pull upon the upper edge of door 3 and cable section 8' a downwardly directed substantially vertical pull upon the lower edge of the door. As will appear from the previous discussion of Figs. 1 and 2, the horizontal and vertical forces simultaneously applied to the door will turn the same smoothly and easily. It will further be apparent thatthe fixed pulleys I2 and I5-are the essential ones which determine the directions of the forces.

According. to the opening arrangement according to Fig. 4, the upper end of door 3 is fastened at 9 again to a cable or chain 1 which is guided over fixed pulleys I1 and I8. The lower end of the door is secured to cable 8 which is guided over a fixed pulley I9. The two cable ends 7 and 8 are joined over the loose pulley I4.

It will now be evident that movement of the loose: pulley I4 in a direction away from wall I, as indicated by arrow 6, causes cable section 7' to apply a substantially horizontal force to the upper edge of the door and cable section 8 to exert an upwardly directed substantially vertical forceto the lower edge of door 3. It will again be apparent that pulleys l1 and I9 determine the direction of the forces. As will further be evident a horizontal and vertical force are simultaneously applied to the door in the most favorable direction.

The previous description will also make it clear that the pull direction does not have to be appliedin the direction of the arrows 6. For instance, in Figs. 3 and 4 pulley I4 could be pulled in a direction substantially vertically upward. Finally, it will be understood that pulley I4 is merely provided to facilitate the application of force to the endless cables.

While it is possible. to provide either the closing arrangement of Fig. 3 or the opening arrangement of Fig. 4, in practice it will generally be preferable to provide both operating arrangements. Furthermore, conventional counterweight systems may be provided. What is claimed is: V

1. An operating arrangement for covering and uncovering an-opening in avertical wall by a rigid slide-up, turn-over closure member hinged at an intermediate'point by at least one arm to said wall and slidably guided at its lower end along said wall forswinging and sliding the clotraction means for exerting a pull upon the upper edge of the closure member in a substantially horizontal direction, said two traction means being joined at their free ends, and third movable guide means guiding said joined traction means and disposed to exert a pull on both said traction means forthe purpose of eifecting the aforesaid vertical and horizontal pulls in response to a displacement of the third guide means, thereby moving the closure member from one position into the. other.

2. An operating arrangement for covering and uncovering an opening in a vertical wall by a rigid slide-up, turn-over closure member hinged at an intermediate point by at least one arm to said wall and slidably guided at its lower end along said wall for swinging and sliding the closure member into an open and a closed position respectively, comprising a flexible cable attached at one end to the lower edge of the closure member and at the other end to the upper edge of the closure member, a first stationarily mounted pulley guiding the cable section attached to the lower edge of the closure member for exerting a pull upon the lower edge of the closure member in a substantially vertical direction, a second stationarily mounted pulley guiding the cable section attached to the upper edge of the closure member for exerting a pull upon the upper edge of the closure member in a substantially horizontal direction, and a third movably mounted idler pulley guiding the cable for exerting a simultaneous pull upon the aforesaid cable sections for the purpose of effecting the aforesaid vertical and horizontal pulls in response to a displacement of the third pulley, thereby moving the closure member from one position into the other;

3. An operating arrangement as described in claim 2 for closing said. closure member, wherein the first pulley is disposed in a plane below the lower edge of the closure member in any angular position of the said edge.

4. An operating arrangement as described in claim 2 for opening said closure member, wherein the first pulley is disposed in a plane above the lower edge of the closure member in any angular position of the said edge.

5. An operating arrangement as described in claim '1, wherein said arm is hinged to the vertical wall above the upper edge of the wall opening and to the closure member near the center of gravity thereofv JACOB WIELAN'D.

REFERENCES CITED The following references are of record in the fileof this patent:.

UNITED STATES PATENTS Number Name Date 693,952 Cross Feb. 25, 1902 962,404 Ogden June 21, 1910 965,940 Ritter -1 Aug. 2,, 1910 1,216,202 Boughton Feb. 13, 1917 1,276,996 Tomkinson Aug. 27, 1918 1,316,677 Boughton Sept. 23, 1919 1,369,425 McHarg Feb. 22, 1921 1,378,123 Lovejoy May 17, 1921 1,382,933 Rush June 28, 1921 1,453,550 Fogal May 1, 1923 1,465,695 Stewart Aug. 21, 1923 1,476,297 Greegor Dec. 4, 1923 

